Ключевые слова: alarm, alert, burn, burning, call, color, colorful, contour, danger, electric, emergency, energy, equipment, fire, fireman, flame, flat, handbell, heat, hook, icon, illustration, isolated, line, linear, matchbox, matches, matchstick, message, notification, outline, pickaxe, pike, pole, rescue, ring, ringing, set, simple, socket, sound, spark, spear, symbol, tool, wood,